Upgrade MSRV to 1.80

[CookieComputing]

Following our conversation in #69 (comment), upgrade the toolchain to 1.80 to keep up with the latest distro MSRV releases

It built for me here:

$ cargo build
warning: `/home/kevinhui/.cargo/config` is deprecated in favor of `config.toml`
note: if you need to support cargo 1.38 or earlier, you can symlink `config` to `config.toml`
warning: `/home/kevinhui/.cargo/config` is deprecated in favor of `config.toml`
note: if you need to support cargo 1.38 or earlier, you can symlink `config` to `config.toml`
   Compiling quote v1.0.37
   Compiling libc v0.2.158
   Compiling shlex v1.3.0
   Compiling serde v1.0.209
   Compiling unicode-xid v0.2.5
   Compiling tower-service v0.3.3
   Compiling indexmap v2.5.0
   Compiling cc v1.1.16
   Compiling syn v2.0.77
   Compiling syn v1.0.109
   Compiling openssl-src v300.3.2+3.3.2
   Compiling openssl-sys v0.9.103
   Compiling ring v0.16.20
   Compiling mio v1.0.2
   Compiling socket2 v0.5.7
   Compiling getrandom v0.2.15
   Compiling dirs-sys v0.4.1
   Compiling is-terminal v0.4.13
   Compiling nix v0.23.2
   Compiling env_logger v0.10.2
   Compiling dirs v5.0.1
   Compiling rand_core v0.6.4
   Compiling rdrand v0.8.3
   Compiling tokio v1.40.0
   Compiling serde_derive v1.0.209
   Compiling openssl-macros v0.1.1
   Compiling thiserror-impl v1.0.63
   Compiling displaydoc v0.2.5
   Compiling zerocopy-derive v0.7.35
   Compiling clap_derive v4.5.13
   Compiling synstructure v0.12.6
   Compiling zerocopy v0.7.35
   Compiling asn1-rs-impl v0.1.0
   Compiling asn1-rs-derive v0.4.0
   Compiling thiserror v1.0.63
   Compiling ppv-lite86 v0.2.20
   Compiling rand_chacha v0.3.1
   Compiling clap v4.5.17
   Compiling asn1-rs v0.5.2
   Compiling rand v0.8.5
   Compiling tokio-util v0.7.12
   Compiling h2 v0.3.26
   Compiling oid-registry v0.6.1
   Compiling der-parser v8.2.0
   Compiling x509-parser v0.14.0
   Compiling uuid v1.10.0
   Compiling bincode v1.3.3
   Compiling serde_bytes v0.11.15
   Compiling serde-big-array v0.5.1
   Compiling serde_urlencoded v0.7.1
   Compiling hyper v0.14.30
   Compiling openssl v0.10.66
   Compiling native-tls v0.2.12
   Compiling tokio-native-tls v0.3.1
   Compiling hyper-tls v0.5.0
   Compiling reqwest v0.11.27
   Compiling sev v4.0.0
   Compiling snpguest v0.6.0 (/home/kevinhui/snpguest)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.70s

CI signals should probably check if I've missed anything else

[CookieComputing]

Huh. Not sure why clippy is failing to install, when https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu.html implies that clippy should be present? I'll take a look when I have time

[tylerfanelli]

No worries, I'll run clippy manually and make any necessary changes.